Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire according to a first embodiment of our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a fragmentary enlarged view showing the details of the tread portion thereof;

FIG. 8 is an end view taken along line 8-8 in FIG. 7;

FIG. 9 is a perspective view of a tread portion of an automobile tire according to a second embodiment of our new design;

FIG. 10 is a front view thereof;

FIG. 11 is a top view thereof;

FIG. 12 is a right side view thereof;

FIG. 13 is a left side view thereof;

FIG. 14 is a rear view thereof;

FIG. 15 is a fragmentary enlarged view showing the details of the tread portion thereof; and,

FIG. 16 is an end view taken along line 16-16 in FIG. 15.

Broken lines in the drawing figures are intended to show portions of the tire that are not being claimed and thus form no part of the claimed design. 

CLAIM The ornamental design for a tread portion of an automobile tire, as shown and described. 